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Matches 351 - 400 out of 3,138

Document Document Title
WO/1998/027036
Liquid-crystal compounds represented by general formula (1) and a liquid-crystal composition containing any of the compounds, wherein R?1� represents C�1-15? alkyl; rings A?1�, A?2�, and A?3� each independently represents trans...  
WO/1998/027035
Fluorinated phenantrene derivatives of the formula (I), in which G means -CHF-CH�2?-or -CF=CH-; E?1�, E?2�, E?3�, E?4�, E?5�, E?6� are identical or different and mean -CH-, -CF- or -N-; and R?1�(-A?1�-M?1�)�a?(-A?2...  
WO/1998/027038
1,3,5-Trifluoronaphthalene derivative of the formula (I): R ?1�(-A?1�-M?1�)�a?(-A?2�-M?2�)�b?-B(-M?3�-A? 3�)�c?(-M?4�-A?4�)�d?-R?2�, in which B is (1) and R?1�(-A?1�-M?1�)�a?(-A?2�-M?2�) and (-M?3...  
WO/1998/027042
5,7-difluoro-1,2,3,4-tetrahydronaphthalene derivatives of formula (I): R?1�(-A?1�-M?1�)�a?(-A?2�-M?2�)�b?-B(-M?3�-A ?3�)�c?(-M?4�-A?4�)�d?-R?2� in which B (i) is and R?1�(-A?1�-M?1�)�a?(-A?2�-M?2�)...  
WO/1998/027179
1,1,5,7-tetrafluoro-1,2,3,4-tetrahydronaphthalene derivatives of the formula (I): R?1�(-A?1�-M?1�)�a?(-A?2�-M?2�)�b?-B(-M?3�-A ?3�)�c?(-M?4�-A�4?)�d?-R?2�, in which B is formula (II) and R?1�(-A?1�-M?1�)...  
WO/1998/027037
1,3-difluoronapthalene derivatives of the formula (I): R�1?(-A?1�-M?1�)�a?(-A?2�-M?2�)�b?-B(-M?3�-A ?3�)�c?(-M?4�-A?4�)�d?-R?2�, in which B is (II) and R?1�(-A?1�-M?1�)�a?(-A?2�-M?2�) and (-M?3�-...  
WO/1998/023564
Liquid-crystalline compounds which have an extremeley high voltage retention, an extremely small temperature dependence of the retention, a low threshold voltage, and a large value of $g(D)n; a liquid-crystal composition containing any o...  
WO/1998/023563
Liquid crystal compounds which exhibit not only a negative anisotropy of permittivity but also extremely high voltage retention and low threshold voltages, are reduced in the temperature dependence of these properties, difficultly exhibi...  
WO/1998/023561
Liquid-crystal compounds having excellent physical properties and excellent compatibility with other liquid-crystal materials; a liquid-crystal composition containing the compounds; and liquid-crystal display elements prepared from the c...  
WO/1998/023562
Liquid crystal compounds which exhibit not only negative anisotropy of permittivity but also extremely high voltage retention and low threshold voltages, are extremely reduced in the temperature dependence of these properties, difficultl...  
WO/1998/022470
Pentafluorophenyl Grignard reagents are reacted with a boron trihalide in a non-ethereal solvent such as toluene to produce a tetrakis-pentafluorophenyl borate magnesium halide.  
WO/1998/022475
The reaction of a fluorophenyl Grignard with a boron trihalide to produce a borane is described.  
WO/1998/022413
A mixture of (i) finely-divided alkali metal fluoride (e.g., KF), (ii) haloaromatic compound having at least one halogen atom of atomic number greater than 9 on an aromatic ring (e.g., C�6?Cl�6?), and (iii) an aminophosphonium cataly...  
WO/1998/017611
A method for synthesizing bromopentafluorobenzene from hexafluorobenzene is described.  
WO/1998/016486
A process for the preparation of a substituted aromatic compound in which a chloroaromatic compound and an alkyl-, alkenyl- or aryl-boronic acid, ester or anhydride are coupled in the presence of palladium and a lipophilic aliphatic phos...  
WO/1998/014418
Liqud crystal compounds and liquid crystal compositions which are best suited as a liquid crystal material required to have negative permittivity including an IPS mode. The compounds are represented by general formulae (1) and (1-1), whe...  
WO/1998/013323
A liquid-crystal compound which exhibits high voltage retention and low threshold voltage, has very small dependency upon the temperature, has a large $g(D)n value, and has excellent compatibility with other liquid-crystal materials at l...  
WO/1998/013324
Liquid-crystal compounds which exhibit an extremely high voltage retention scarcely dependent on the temperature and a large $g(D)n value and are excellent in the compatibility with other liquid-crystal materials particularly at low temp...  
WO/1998/013321
There is herein disclosed a compound represented by general formula (1) wherein R�1? is an alkadienyl group having 4 to 10 carbon atoms in which a hydrogen atom may be substituted by a fluorine atom or the like; R�2? is an alkenyl gr...  
WO/1998/013322
A liquid-crystal compound which exhibits high voltage retention and low threshold voltage, has very small dependency upon the temperature, has a large $g(D)n value, and has excellent compatibility with other liquid-crystal materials at l...  
WO/1998/008792
A tetracyclic compound expressed by general formula (1) wherein H�1? to H�12? represent hydrogen atom at least one of which is replaced by a halogen atom, when either H�6? or H�8? is replaced by a halogen atom, at least one of th...  
WO/1998/008791
There are herein disclosed a fluorovinyl derivative compound represented by general formula (1) and having characteristics of a liquid crystal, a liquid crystal composition, and a liquid crystal display device formed by using this compos...  
WO/1998/008788
A two step bromination process for manufacturing a polybrominated indane product such as octabromophenyl indane comprises the steps of: (a) forming an intermediate by reacting an indane compound with bromine, under reaction conditions so...  
WO/1998/007674
There are herein disclosed a difluorophenyl derivative compound having characteristics of a liquid crystal represented by general formula (1), a liquid crystal composition and a liquid crystal display device in which the composition is u...  
WO/1998/005610
A process is disclosed for preparing fluorine-containing compounds by reacting a compound which contains a halogen that can be replaced by fluorine with a fluoride or a mixture of fluorides of general formula (I): MeF, in the presence of...  
WO/1998/002409
The halogenation of a compound of formula (1) or formula (2'), wherein Q is an NH�2? group optionally in the form of an addition salt, or an NHCOCH�3? group, and X is a halogen atom, using a compound of formula X�2?, in a solvent s...  
WO/1997/046534
The invention relates to a process for producing substituted aryl pyrazoles of general formula (I) in which R1, R2, R3 and R4 have the meanings given in the description, and novel intermediate products for producing said aryl pyrazoles.  
WO/1997/045389
Disclosed is a method of making 1,2,4-trichlorobenzene. Dichlorobenzene containing less than an isomeric amount of meta-dichlorobenzene is isomerized to produce an isomeric mixture of dichlorobenzenes substantially rich in meta-dichlorob...  
WO/1997/041083
Compounds containing a primary amino group are converted into compounds containing a fluorine atom in place of the amino group by reaction of the amino compound with hydrogen fluoride and a nitrosating reagent under the influence of ultr...  
WO/1997/034855
Liquid crystalline compounds expressed by formula (1), liquid crystal compositions thereof obtained by combination with specified liquid crystal compounds, and liquid crystal display devices using them, wherein A1, A2, A3 and A4 denote e...  
WO/1997/034589
The present invention provides a class of chemical compounds useful as efficacious drugs in the treatment of sickle cell disease and diseases characterized by unwanted or abnormal cell proliferation. The active compounds are substituted ...  
WO/1997/032832
The production of fluorinated aromatic compounds of general formula (I), in which W, X, Z, R1 and R2 have the meanings given in the description, from corresponding C1 or Br-containing compounds with fluorides, e.g. KF, with halogen excha...  
WO/1997/026237
Novel aromatic polycyclic retinoid-type derivatives of general formula (I), wherein groupings R3 and R4 attached to the double bond between carbons 11 and 12 are cis groupings, and pharmaceutical and cosmetic compositions containing same...  
WO/1997/020877
Poly(bis-9,9'-fluorenes) are disclosed with identical or different recurring structural elements of formula (I), in which the two R1 groups independently of one another stand for H, C1-C18-alkyl, C6-C14-aryl, C7-C15-aralkyl, C1-C18-alkox...  
WO/1997/018893
The present invention relates to a catalyst for preparing para-chloro aromatic compounds by the liquid-phase chlorination method. The catalyst is prepared by loading transition metal salts, rare earth metal salts or a mixture thereof, an...  
WO/1997/016406
A compound of the formula (I): A-L-D where A is a moiety which absorbs radiation and enters an excited state in which it accepts an electron; L is a linking group which tethers an electron acceptor moiety A to the electron donor moiety D...  
WO/1997/015541
Cyclic 'alpha'-perfluoro-di-p-xylylenes having the structure (I), wherein G is an aromatic nuclear substituent group selected from the group consisting of chlorine and fluorine (m = 4), and perfluoroalkyl groups having the formula CnF2n+...  
WO/1997/013821
There are proposed liquid crystalline compounds expressed by formula (1) having high elastic constant ratio, low viscosity, stability as well as superior compatibility with other liquid crystalline compounds such as those expressed by ge...  
WO/1997/010617
The invention concerns a photo-voltaic cell characterized in that it contains as the charge-transfer layer a perforated conductor material which preferably consists of an amorphous solid.  
WO/1997/006124
Novel liquid-crystal compounds represented by general formula (1) and having a large value of permittivity anisotropy, a high voltage retention at service temperatures, a low threshold voltage, and improved compatibilities with other liq...  
WO/1997/005184
The invention relates to 2,7-substituted-9-substituted fluorenes and 9-substituted fluorene oligomers and polymers. The fluorenes, oligomers and polymers are substituted at the 9-position with two hydrocarbyl moieties which may optionall...  
WO/1997/002247
Disclosed are fluorinated phenanthrene derivatives of formula (I), in which the symbols and indices have the following meanings: E1, E2, E3, E4, E5 and E6 are identical or different and stand for -N-, -CF- or -CH-; G is -CF2CF2- or -CF=C...  
WO/1996/041788
An object of the invention is to find out a promoter enabling the production of a 2,6-dichloro-3,5-di(secondary or tertiary alkyl)toluene of general formula (I) in a high yield without any restriction due to reaction scale. A 2,6-dichlor...  
WO/1996/041787
Liquid crystal compounds being excellent in compatibility with other liquid crystal materials and stability and having a low viscosity and a high isotropic phase transition temperature; a liquid crystal composition containing at least on...  
WO/1996/037451
A novel liquid crystalline compound having a large elastic constant ratio, excellent compatibility with other liquid crystalline compound(s) particularly at a low temperature, and chemical stability, or a liquid crystalline compound havi...  
WO/1996/035664
New compounds have the formula (I), in which X stands for halogen, Y stands for halogen or alkyl and Z stands for halogen or alkyl, provided that one of the residues Y and Z always stands for halogen and the other for alkyl, and Het stan...  
WO/1996/028403
Tetracyclic compounds having structure (1) are described, wherein R1-R10 are as defined. The tetracyclic compounds are capable of potent effects on steroid sensitive tissues and have demonstrated increased uterine weight, antiovolatory e...  
WO/1996/027584
An energy-sensitive (e.g., thermal, radiation or photosensitive) initiator, curative, and/or catalytic salt that has an anion comprising a tris-(highly fluorinated alkylsulfonyl)methide, tris-(fluorinated arylsulfonyl)methide, bis-(highl...  
WO/1996/025376
4-Isobutylstyrene and other olefinic compounds corresponding to the formula C(R3)(R4)=C(R2)A are prepared by reacting an organic compound having the formula AX with a vinyl or substituted vinyl compound having the formula C(R3)(R4)=C(R2)...  
WO/1996/015087
This invention relates to a novel process which comprises feeding a mixture formed from diphenylethane and bromine to a stirrable reaction mass comprised of bromine and a bromination catalyst to yield a decabromodiphenylethane wet cake w...  

Matches 351 - 400 out of 3,138